An in-situ long-term remediation material for chromium-contaminated soil
A technology for chromium-contaminated soil and remediation materials is applied in the field of in-situ long-acting remediation materials for chromium-contaminated soil, and can solve problems such as soil degradation, decline in crop yield and quality, and adverse effects on plant physiological functions.
Active Publication Date: 2021-04-23
SICHUAN UNIV
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Problems solved by technology
This type of pollution has a wide range, long duration, hidden pollution, and cannot be biodegraded, which will lead to soil degradation, decline in crop yield and quality, and pollute surface water and groundwater through runoff and leaching.
Excessive heavy metals will have adverse effects on plant physiological functions, making it nutritionally imbalanced
Method used
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experiment example
[0042] The following 5 groups of experiments are set up in Table 1 to further illustrate the present invention, but the present invention is not limited thereto. Experiment 1 was carried out according to the following steps [1] and [5], Experiment 2 and Experiment 4 were carried out according to the following steps [1], [2], [4], [5] respectively, and Experiment 1 and Experiment 3 were carried out according to the following steps [1], [2], [3], [4], [5] conduct experiments.
[0043] Table 1 Experimental design
[0044]
[0045] Experimental method steps:
[0046] [1] Prepare 10kg of contaminated soil with a chromium content of 5.0mg / kg, place it in a flowerpot with a sealed bottom, a diameter of 30cm at the top, and a height of 50cm.
[0047] [2] Weigh the corresponding quality materials according to the above table, mix them evenly, and form granules with a diameter of about 4mm after high-pressure extrusion granulation (compression ratio 20:1).
[0048] [3] Keep 1 / 3 of...
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Abstract
This application provides an in-situ long-term restoration material for chromium-contaminated soil, including three kinds of materials for repairing chromium pollution; one is composed of a substrate capable of adsorbing chromium; Particulate matter; a particulate matter that coats a substrate capable of absorbing chromium with a long-term degradable film. The in-situ long-term restoration materials for chromium-contaminated soil provided by this application will take effect immediately after application without film wrapping, and the validity period is 3-6 months; the materials wrapped with polyester film will be 3-6 months in the soil The material begins to degrade within a month, and the material begins to take effect; the coated polyester film-wrapped material begins to degrade within 12-18 months in the soil, and the material begins to take effect, and the long-term effect of the pollution control material is generally realized.
Description
technical field [0001] The invention relates to the technical field of environmental treatment, in particular to an in-situ long-acting restoration material for chromium-contaminated soil. Background technique [0002] Soil is the natural environment on which human beings depend and an important resource for agricultural production. Food, resources and environment soil heavy metal pollution that the world is facing refers to pollution caused by excessive accumulation of heavy metals in soil. Heavy metals in contaminated soil include elements with significant biological toxicity such as Cd, Pb, Hg, Cr, As, and elements with certain toxicity such as Cu, Zn, Ni. This type of pollution has a wide range, long duration, hidden pollution, and cannot be biodegraded, which will lead to soil degradation, decline in crop yield and quality, and pollute surface water and groundwater through runoff and leaching. Excessive heavy metals will have adverse effects on plant physiological fun...
Claims
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IPC IPC(8): C09K17/40
CPCC09K17/40
Inventor 孙海龙苟敏刘志斌李乃稳李绍才王丽
Owner SICHUAN UNIV